* mml2015.el (mml2015-epg-sign, mml2015-epg-encrypt): Let users select
signing keys if mm-sign-option is 'guided.
* mml-smime.el (mml-smime-epg-sign, mml-smime-epg-encrypt): Ditto.
+ * mml1991.el (mml1991-epg-sign, mml1991-epg-encrypt): Ditto.
2009-09-15 Katsumi Yamaoka <yamaoka@jpl.org>